Skylight leak repair

Skylight Leak Repair in Indianapolis, IN

Skylight leaks usually come from the flashing, not the glass. We find the true entry point, then repair, reflash, replace or remove the unit.

Call (317) 555-0142

Get A Written Estimate

The short answer: If your roof has years left and the damage is in one area, repair it. If shingles are failing across the roof or the same leaks keep returning, a replacement saves money over time. We tell you which one applies, with photos.

Skylight leak repair in Indianapolis

A skylight brings daylight into a dark room, but it also puts a hole in the roof surrounded by a frame, glass and a ring of flashing. When any part of that system fails, water finds its way into the ceiling, the walls and the attic. Skylight leaks are frustrating because the stain on the ceiling is often not where the water enters, and because many leaks that look like a bad skylight are actually something else.

R&R Roofing diagnoses and repairs leaking skylights on homes across Indianapolis and Marion County. We find the real source first, then recommend the smallest fix that will last: resealing, reflashing, replacing a failed unit or, when the skylight is the wrong answer, removing and decking it over.

A skylight usually leaks for one of four reasons: failed or poorly installed flashing around the frame, a cracked or worn seal at the glazing, condensation that mimics a leak, or a roof problem upslope that only shows up at the skylight. Fixing it properly means finding the true entry point before sealing anything.

How a skylight is supposed to stay watertight

A well-installed skylight is a layered system. Understanding the layers makes it easier to see where leaks start.

The curb or frame

Skylights are either mounted on a raised wooden curb built above the roof deck or set into a frame that sits flush with the roof surface (deck-mounted). The curb lifts the opening above the water flow on the roof, which is why curb-mounted units are common on low-slope roofs.

Flashing

Flashing is the metal or flexible membrane that seals the joint between the skylight and the roof. Most skylight flashing kits use step flashing on the sides, a sill flashing at the bottom and a head flashing at the top, each overlapped with the shingles in order so water always flows over the layer below it. Manufacturers publish installation instructions for their own flashing kits, and following them matters. See our page on roof leak repair for how we trace water through layers like these.

Underlayment and water barrier

Self-adhering membranes and underlayment around the opening give a second line of defense if water gets past the flashing.

The glazing and seals

The glass or acrylic dome sits in a frame with gaskets and sealants. Over time, those seals can dry out, crack or separate.

The light shaft and interior finish

Inside, the shaft carries light down through the attic to the ceiling. Insulation, vapor control and finish matter, because condensation can form on cold surfaces inside the shaft.

Why skylights leak

Flashing failure. Rust, bent metal, lifted edges and sealant that has dried and cracked let water behind the flashing.
Roofing cement as a patch. Tar-like sealant used as a fix instead of proper flashing fails within a few seasons.
Poor installation. Flashing not woven into the shingles, missing underlayment or a unit installed without the manufacturer’s kit is a common cause of leaks within the first few years.
Aged seals and gaskets. Rubber and sealants break down with sun and temperature swings.
Cracked glazing or dome. Hail, a fallen branch or thermal stress can crack glass or acrylic.
Debris and ponding. Leaves and shingle grit can collect on the upslope side and hold water against the frame, especially on a low-slope roof.
Ice and snow. Indianapolis averages about 25.5 inches of snow a year according to National Weather Service normals, and snow that melts and refreezes around a skylight can push water under flashing.
Condensation. Warm, moist indoor air meeting a cold glass surface produces water droplets that run down the glass and can look like a leak.
Worn shingles around the unit. Even good flashing cannot stop water if the surrounding shingles are failing.

Leak or condensation? How to tell

Many calls about leaking skylights turn out to be condensation, and the repair is different.

Condensation appears as droplets or fog on the glass or frame, usually on cold mornings and in humid rooms such as kitchens and bathrooms. It does not usually correspond with the timing of rain.
A true leak appears during or soon after rain or snowmelt, and stains typically show up on the ceiling or shaft walls in a pattern that follows the flashing.
A leak that gets worse in wind-driven rain often points at the flashing or the glazing seal.
A stain that appears long after the rain stops may be water that traveled along framing before it dripped.

If it is condensation, the fix may involve ventilation, humidity control, insulating the shaft or upgrading to a better unit rather than reflashing. Our page on roof ventilation covers the role of attic air flow.

Signs your skylight may be leaking

Brown or yellow stains on the ceiling or shaft walls near the skylight
Peeling paint, bubbling drywall or mold around the skylight opening
Drips or damp spots during rain or snowmelt
Visible rust, gaps or lifted metal around the frame
Cracked or foggy glazing, which suggests a failed seal between panes
Soaked insulation in the attic around the light shaft
Dark streaks on the roof below the skylight where water has been running

If you see any of these, call for a roof inspection. Water that reaches framing or insulation can do damage long before the ceiling shows a stain.

How we diagnose a skylight leak

Interior look. We check ceiling, shaft and attic for stains, staining direction, wet insulation and daylight around the frame.
Roof-level inspection. We examine the flashing, sealant, shingles and glazing for damage and for signs of past patches.
Water testing when needed. If the source is not obvious, we test sections of the roof in order, starting low and working upslope, and watch for water inside.
Check the roof above. A leak from a vent, a valley or an old nail can travel to a skylight, so we look upslope as well.
Written findings. You receive a clear explanation, photographs and options with prices.

Skylight leak repair options

Resealing and minor repair

If the flashing is sound and only a seal or fastener cap has failed, a targeted repair can be enough. We use compatible sealants and replace damaged fasteners and small areas of shingle. This is the least expensive option, but it only works when the underlying flashing is intact.

Reflashing the skylight

When flashing is rusted, bent or was never installed correctly, we remove the surrounding shingles, repair the deck, install new underlayment and self-adhering membrane, and set a complete flashing kit that matches your skylight model. This is the most common lasting fix for a skylight that has leaked more than once.

Replacing the skylight unit

If the glazing is cracked, the seal between panes has failed, or the unit is old and obsolete, replacement may make more sense than repair. A new unit installed with a new flashing kit and the manufacturer’s instructions gives you a fresh start and a warranty.

Removing and decking over a skylight

If you no longer want the skylight, or the room does not need it, we can remove it, frame and deck the opening, and install matching roofing. This is the most reliable way to eliminate a chronic leak.

Repair or replace the roof instead

Sometimes the skylight is only the place where an older roof is failing. If the roof is near the end of its life, repairing around the skylight may not make sense. We will tell you plainly if it is better to plan for a roof replacement.

Flat roof and low-slope skylights

Skylights on low-slope or flat roofs often sit on a curb and rely on a membrane that is flashed up and over the curb. Leaks there usually come from membrane seams, curb flashing terminations and ponding water. These systems differ from steep-slope shingle flashing, so the repair method does too. We evaluate the system you actually have.

Tubular skylights and sun tunnels

Tubular skylights have a small dome and a flexible or rigid tube. They leak at the dome flashing or at the collar where the tube meets the roof, and condensation inside the tube can drip at the ceiling diffuser. They are usually simpler to reflash or replace than a full skylight, and we handle them as part of the same service.

Skylight leak repair costs

Price depends on the skylight type and size, roof pitch and height, the repair needed, the condition of the shingles and deck, and whether the unit itself needs replacement. We do not quote a flat price over the phone because the right fix is not known until we look. This Old House reports that Indianapolis homeowners pay about 931 dollars on average for roof repairs, and a skylight reflash or replacement can be above or below that depending on scope. After inspection you receive a written estimate. Indiana law requires a written contract for residential home improvement work over 150 dollars signed by both sides. See our roof repair page for what drives repair costs.

Insurance and skylight leaks

Coverage depends on the cause. A skylight cracked by hail or a fallen limb may be part of a covered storm claim. A leak caused by old sealant, rust or poor installation is typically treated as maintenance and not covered. The Indiana Department of Insurance advises photographing damage before temporary repairs, keeping receipts, filing quickly and not making permanent repairs until the insurer has inspected. If you think a storm damaged your skylight, our hail damage and roof insurance claim guides explain what to document.

What to do while you wait for a skylight repair

Protect the room first. Move furniture, place a bucket under the drip and lay plastic over anything you cannot move. Poke a small hole in a bulging ceiling to let trapped water drain into a bucket rather than letting it collapse unpredictably, and keep clear of the area below. Take dated photos of the stain, the skylight and the attic if it is safe. Do not climb onto the roof in wet or icy conditions. Avoid sealing with hardware-store caulk, which can trap water and complicate the repair. If water is actively entering and more rain is coming, call us for emergency roof repair so we can place temporary protection.

Skylight leak repair across Indianapolis

Skylights are common in remodeled bungalows and cottages in Irvington, Garfield Park, Fountain Square, Meridian-Kessler and Broad Ripple, as well as newer homes in Castleton, Wanamaker and Warren Park. We also serve Lawrence, Speedway, Beech Grove and Southport. ZIP codes we serve include 46201, 46203, 46205, 46208, 46218, 46219, 46220, 46224, 46226, 46227 and 46237. If your home is in a historic district, check with the Indianapolis Historic Preservation Commission before changing visible exterior features.

Preventing skylight leaks

Have your skylights inspected once a year and after major storms. Keep leaves and debris off the upslope side. Trim branches that rub the roof. Replace aged sealants before they fail. Keep humidity under control inside the home so condensation does not damage the shaft finish. And avoid patching with roofing cement, since it hides the real problem and shortens the life of the repair.

Questions to ask a roofer about your skylight

Ask whether the quote includes a complete manufacturer flashing kit or only sealant. Ask how the flashing will be woven into the shingles. Ask whether the surrounding shingles will be replaced. Ask whether the unit itself is repairable and what the warranty covers on labor and materials. Ask how the roofer will confirm the leak is fixed. A contractor who can answer each of these has done the work before. See how to choose a roofer in Indianapolis for the full list of questions.

Skylight leak questions, answered

Why is my skylight leaking when it rains?

The most common cause is failed flashing around the frame. Other causes include aged seals, cracked glazing, a roof leak upslope or condensation that looks like a leak.

How do I tell if my skylight leak is condensation?

Condensation shows up as droplets on the glass or frame, often on cold mornings and in humid rooms, and not necessarily during rain. A true leak follows rain or snowmelt and stains the ceiling or shaft.

How much does skylight leak repair cost in Indianapolis?

It depends on the skylight type, roof pitch, repair needed and whether the unit is replaced. This Old House reports about 931 dollars as the average Indianapolis roof repair. We give a written estimate after inspection.

Can I fix a skylight leak with caulk or roofing cement?

It may slow a leak briefly, but sealant dries and cracks. A lasting repair uses proper flashing integrated with the shingles and underlayment.

Should I repair, replace or remove my skylight?

If the flashing failed and the unit is sound, reflashing is usually enough. If the glazing is cracked or the seal has failed, replacement may be better. If you do not need the skylight, removal ends the leak risk.

How long does skylight flashing last?

It depends on the material and installation quality. Flashing installed to the manufacturer instructions can last many years, while sealant-dependent repairs often fail within a few seasons.

Why does my skylight leak only in heavy wind-driven rain?

Wind pushes water sideways and upward under flashing and seals that shed ordinary rain. That points to a flashing, sealant or glazing gap.

Does insurance cover a leaking skylight?

Sometimes. Storm damage such as hail or a fallen limb may be covered. Leaks from age, wear or poor installation usually are not. Document the damage and read your policy.

How long does a skylight repair take?

Many repairs finish in a day. Replacement or a reflash with deck repair may take longer, and weather affects scheduling.

Can a skylight leak damage my attic and ceiling?

Yes. Water can soak insulation, stain drywall, rot framing and promote mold, which is why we recommend an inspection as soon as you see a stain.

Related:

R&R Roofing

Roofing contractor serving Indianapolis, Indiana and the surrounding suburbs.

(317) 555-0142
123 Main Street, Indianapolis, IN 46204
License #RR-2019-4821, fully insured